Fig. 5. (A) Methylene Blue stained preparation showing the pattern of nerve innervation on a portion of caterpillar skeletal muscle. (B) Portion of larval muscle, probed with anti-C-terminal antibody and Vector Red staining, showing a motor neuron running alongside and passing under a tracheal segment on the muscle surface. Note the similarity to the Methylene Blue preparation. A, axon; M, muscle; MN, motor neuron; T, trachea. Bar, 100 µm.